-- @testpoint: opengauss关键字Greatest(非保留)，作为函数名，部分测试点合理报错

--关键字不带引号-失败
drop function if exists Greatest;
create function Greatest(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带双引号-成功
drop function if exists "Greatest";
create function "Greatest"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function if exists "Greatest";

--关键字带单引号-合理报错
drop function if exists 'Greatest';
create function 'Greatest'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带反引号-合理报错
drop function if exists `Greatest`;
create function `Greatest`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
